Thread Prog in C language (seg fault)

[Codeplug]

Without changing the code, all you can do is ask the system administrator to increase the number of allowed per-process shared memory segments.

>> would request you to give me some solution for this
As I mentioned in the 2nd post, this can be fixed by using a single shared memory segment for all shared data. That means you call shmget() and shmat() only once. Then use that one block of shared memory for all your needs.

gg

[kumars]

I am not sure, but what I believe is that for each writer I am creating 3 shared memory segments.

like for each writer I am creating

for(i = 0; i < num_writers; i++) {
     
        read_count[i] ===> shmget() and shmat()
        checksum[i]    ===> shmget() and shmat()
        shmptr[i]        ===> shmget() and shmat()
}

This works fine when num_writers is 3 but it fails when num_writers is 4 or more. Anyway will try other way also as you suggested (will create only 1 segment).